Confirmation on challenge question

Question

I came across this question in a challenge, and I have doubt on what the correct answer was, the language is c# and the code goes as follow

int x = 2;
int y = 5;
if (x < y || ++y == 6){
y -= x;
}
console.write(y);

I think the answer is 4 but it was instead 3 both i and my challenger got it wrong.

can someone explain why it is 3 to me

Answer 1

Good question! This is a little logical, did you notice the if statement in the code? It uses the || operator in between the two conditions and thus, what the compiler does is checks for the first condition (i.e. x < y) and if it is true, moves on executing the compound block of code without letting it check if (++y == 6) as well. Hence, y doesn't gets incremented!

P.S. "y" remains 5 and is subtracted from 2 to get the output as 3.

If it would have used the && operator instead, the output would've been 4 as it then should check both the conditions to be true. That is,

if (x < y && ++y == 6){
y -= x; // now y becomes 4
}

Answer 2

brilliant Dev, that explains it thanks a lot